Ask a growing business how its systems connect and you will often hear the same answer: “Sana handles that.” Sana copies orders from Shopify into the accounting system, updates stock in the warehouse spreadsheet and re-enters customer details into the CRM. She is brilliant, and she is also a very expensive, very tired integration layer.
The costs nobody adds up
Double entry rarely appears in a budget, because it is spread across many people in ten-minute chunks. But the costs are real, and they compound as order volumes grow. In our experience they fall into four groups, and the salary hours are usually the smallest of them.
There is also a human cost. Re-keying data is tedious, and tedious work is where attention slips, usually late in the day or at month-end when volumes peak. Talented people who joined to manage customers or analyse numbers end up as copy typists, and some of them leave. Replacing them means recruitment fees, training time and months of lost knowledge.
- Time — every order, invoice or new customer typed twice, often by your most experienced people.
- Errors — a wrong digit in a price, quantity or TRN leads to credit notes, refunds and awkward calls.
- Delays — data is only as current as the last time someone copied it, so stock and cash positions are always slightly wrong.
- Compliance risk — e-invoicing under ZATCA and the UAE’s upcoming regime requires consistent data across systems.
How to measure your own cost
Spend one week counting. List every place where information is copied from one screen to another, how many times it happens and roughly how long each takes. Then add the time spent fixing mistakes. A simple example: 60 orders a day, four minutes each to re-enter, is four hours daily, which is half a full-time role before a single error is corrected.
Then estimate the cost of errors. Ask finance how many credit notes, refunds or corrected invoices were raised last quarter because of typing mistakes, and ask the warehouse how often stock figures were wrong. Even a handful of wrong deliveries or disputed invoices each month, multiplied by the staff time to fix them and the occasional lost customer, usually dwarfs the cost of the original data entry.
Your best employee should not be your integration layer.
How APIs remove double entry
An API is a doorway that lets one system read and write data in another, safely and automatically. Shopify, WooCommerce, Noon, Amazon.ae, Zoho, Xero, Odoo, SAP Business One and most modern platforms offer one. Integration means connecting those doorways so that an order placed in one system appears in the others within seconds, with nobody retyping it.
There are three common approaches. Ready-made connectors from app stores are cheap and quick for standard flows. Integration platforms such as Make, Zapier or Zoho Flow handle simple multi-step automations. Custom integrations make sense when volumes are high, logic is specific to your business or you need proper error handling and retries, which is where most mid-sized companies end up.
What a good integration includes
A reliable integration is more than moving data from A to B. It needs to handle failures gracefully, retry when a system is briefly unavailable, avoid creating duplicates and alert someone when something cannot be resolved automatically. It should also keep a log, so finance can trace exactly when an order reached the ledger. These details separate integrations people trust from ones they quietly double-check by hand.
Decide early which system is the single source of truth for each type of data. Customer details might live in the CRM, prices and stock in the ERP, and payments in the accounting system. When everyone agrees where each record is owned, integrations stay simple and conflicts, such as two systems overwriting each other’s changes, largely disappear.
Costs vary widely. A ready-made connector might be $20 to $100 a month. A custom integration between two systems typically costs $3,000 to $15,000 to build, depending on complexity, plus modest monthly hosting. Compared with the cost of half a full-time role and the errors that come with it, payback often arrives within months.
Start with one flow, usually online orders into accounting or stock, because it has the highest volume and the clearest rules. Run the integration alongside the manual process for a week or two and compare the results. Once the numbers match, switch off the manual step and move on to the next flow with confidence. Most businesses find that three or four well-built integrations remove the vast majority of their retyping.
The bottom line
Manual double entry feels free because nobody invoices you for it. In reality it costs time, accuracy and the attention of good people who could be serving customers. Measure it honestly, connect your highest-volume systems first, and let your team do the work that actually needs a human. Sana will thank you.
